Signal lamp, a device for communicating between ships with flashing lights.
•
Traffic light, signal lights controlling automotive & pedestrian traffic flow
•
Railway signalling, use of signal lights to control train traffic flow
Friday Night Lights | Friday Night Lights (TV series) | City Lights | signal processing | Friday Night Lights (film) | Digital signal processor | Christmas lights | Digital signal processing | digital signal processing | Digital Signal 1 | City Lights Bookstore | Christmas lights (holiday decoration) | Bat-Signal | "Signal Hill" | Northern Lights | Indy Lights | Busy Signal | Battle of Signal Hill Vietnam | Analog signal | Union Switch & Signal | The Signal (2007 film) | The Signal | Signal Mountain | Signal Hill | Lights | Harbor Lights | Festival of Lights | Extracellular signal-regulated kinases | digital signal processor | Bright Lights, Big City |
The San Diego Trolley system was shut down as there was no power to operate signal lights and related functions, and trains were stopped in Los Angeles for the same reason.